plugins/correlator/correlator.c

   1 /*
   2  * correlator.c
   3  *
   4  * Babeltrace Trace Correlator
   5  *
   6  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #include <babeltrace/plugin/plugin-macros.h>
  30 #include <babeltrace/plugin/component.h>
  31 #include <babeltrace/plugin/filter.h>
  32 #include <babeltrace/plugin/notification/notification.h>
  33 #include <babeltrace/plugin/notification/iterator.h>
  34 #include <babeltrace/plugin/notification/event.h>
  35 #include "correlator.h"
  36
  37 static
  38 void destroy_correlator_data(struct correlator *correlator)
  39 {
  40         g_free(correlator);
  41 }
  42
  43 static
  44 struct correlator *create_correlator(void)
  45 {
  46         struct correlator *correlator;
  47
  48         correlator = g_new0(struct correlator, 1);
  49         if (!correlator) {
  50                 goto end;
  51         }
  52 end:
  53         return correlator;
  54 }
  55
  56 static
  57 void destroy_correlator(struct bt_component *component)
  58 {
  59         void *data = bt_component_get_private_data(component);
  60
  61         destroy_correlator_data(data);
  62 }
  63
  64 enum bt_component_status correlator_component_init(
  65         struct bt_component *component, struct bt_value *params)
  66 {
  67         enum bt_component_status ret;
  68         struct correlator *correlator = create_correlator();
  69
  70         if (!correlator) {
  71                 ret = BT_COMPONENT_STATUS_NOMEM;
  72                 goto end;
  73         }
  74
  75         ret = bt_component_set_destroy_cb(component,
  76                         destroy_correlator);
  77         if (ret != BT_COMPONENT_STATUS_OK) {
  78                 goto error;
  79         }
  80
  81         ret = bt_component_set_private_data(component, correlator);
  82         if (ret != BT_COMPONENT_STATUS_OK) {
  83                 goto error;
  84         }
  85 end:
  86         return ret;
  87 error:
  88         destroy_correlator_data(correlator);
  89         return ret;
  90 }
  91
  92 /* Initialize plug-in entry points. */
  93 BT_PLUGIN_NAME("correlator");
  94 BT_PLUGIN_DESCRIPTION("Babeltrace Trace Correlator Plug-In.");
  95 BT_PLUGIN_AUTHOR("Jérémie Galarneau");
  96 BT_PLUGIN_LICENSE("MIT");
  97
  98 BT_PLUGIN_COMPONENT_CLASSES_BEGIN
  99 BT_PLUGIN_FILTER_COMPONENT_CLASS_ENTRY("correlator",
 100                 "Time-correlate multiple traces.",
 101                 correlator_component_init)
 102 BT_PLUGIN_COMPONENT_CLASSES_END